> I think the quote is used to point out that Apple did nothing (legally) wrong by following the existing law.
I think you're simply wrong here. The quote very clearly refers to morality, not legality[0], so I criticize it on moral grounds.
> I say, OK, you first. There's a line on the tax form where you can voluntarily pay more. Put your money where your mouth is, I say.
Funny you should bring this up! This is the HN corporate tax argument I hate second-most, after the Learned Hand quote. It's a tu quoque fallacy that's simply used as a gag order to pre-emptively shut down any debate on the issue, since obviously no one meets that standard.
[0] And even if it didn't, that's how it's used in practice when it's posted here.